KR20090083293A - Lubricating pump - Google Patents

Abstract

A lubrication pump driving a collecting unit and transmission unit is provided to prevent the lubricant fluid agent from accumulating in a sump. A lubrication pump comprises a transmission unit(5), a collecting unit(10), and a housing. The transmission unit has an inlet(6) and a outlet(7). The inlet of the transmission unit is connected a lubricative fluid tank for the lubricant fluid agent. The outlet of the transmission unit is connected to a lubrication target apparatus by a hydraulic mode. An opening of the fetching unit is connected to a casing accommodating the lubrication target apparatus by the hydraulic mode. An exit of the collecting unit is connected to the lubricative fluid tank for the lubricant fluid agent by the hydraulic mode. The collecting collects the lubricant fluid agent by transmitting the agent to the lubricative fluid tank. The housing accommodates the transmission unit and the collecting unit.

Description

Lubrication Pump {LUBRICATING PUMP}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lubrication pump, and more particularly to a lubrication pump used for a drive or the like for powering an rotor of an aircraft turbine or a helicopter.

Lubrication pumps are known to recover lubricating fluid from a casing that injects lubricating fluid and supplies it to a lubrication target device, for example, a drive for driving a rotor of a helicopter, an aircraft or a turbine, and receives the lubricating fluid in the lubrication target device.

The lubricating fluid supplied as described above has a problem that the lubricating fluid is supplied to the inside of the apparatus to be lubricated and accumulated and exists. In addition, the conventional lubricating pump is assembled with a plurality of mechanical parts, so that the weight of the lubricating pump itself is large and the size of the lubricating pump is increased. There was a problem that the transfer and storage of the uncomfortable.

In particular, the lubrication pump installed in the device that supplies power such as an aircraft or a helicopter saves the power and fuel required by the aircraft if the weight is reduced a little. There was a desperate need.

An object of the present invention is that the lubrication pump installed in the device for supplying power, such as aircraft or helicopters, if the weight is reduced a little, the power and fuel required for the aircraft is saved, so that the weight is light, the size is small, and the lubrication excellent lubrication effect To provide a pump and its lubrication system.

In order to achieve the above object, the present invention includes an inlet (6) that can be hydraulically connected to the tank (4) for lubricating fluid and a discharge port (7) that is hydraulically connectable to the lubrication target device (3), lubricating oil A delivery part (5) through which a sieve flows from the lubricating fluid tank (4) through an inlet port and is compressed and sent to the lubrication target device (3) through an outlet port;

An inlet 11, which is hydraulically connectable to the casing 9, which houses the lubrication target device 3, and an outlet 13, which is hydraulically connectable to the lubricating fluid tank 4, wherein the casing 9. A recovery unit 10 for transferring and recovering the lubricating fluid in the tank) to the lubricating fluid tank 4;

It relates to a lubrication pump 1, characterized in that it comprises a housing 20 for receiving the discharge portion 5 and the recovery portion 10.

The present invention configured as described above does not require two motors, that is, a motor driving the recovery part and the discharge part, respectively, and uses a very small number of components by driving the recovery part and the discharge part of the lubrication pump with one motor. Lubrication pump is light in weight, small in size and has an excellent lubricating effect.

In addition, the present invention is effective in preventing the accumulation and presence of lubricating fluid in the sump and increasing the effect of lubrication by recovering the lubricating fluid accumulated and present in a large amount of casing sump. .

In addition, another effect of the present invention is that since the recovery part lobe of the lubrication pump has a cycloid shape and the rotor is driven by the delivery part, the stress due to the relative sliding of the lobe is significantly reduced and the life of the rotor can be extended. have.

An embodiment of the present invention will be described with reference to the accompanying drawings, but the present invention is not limited thereto. That is, the embodiment of the present invention describes the lubrication pump 1 used in the drive 3 for supplying power to the rotor of the helicopter as the lubrication target device, but the lubrication target device for powering the rotor of the helicopter It is to be understood that the lubrication pump 1 of the present invention can be used in any device that is not limited to a drive and in which a lubrication pump is required.

1 to 7, reference numeral 1 denotes a lubrication pump configured to be installed in the drive 3 for powering the rotor of the helicopter as mentioned above.

7 shows only a drive for driving the rotor as the lubrication target device 3 of the helicopter.

In the drawings, reference numeral 3 denotes a lubrication target device, 4 denotes a tank for lubricating fluid, 9 denotes a casing for accommodating the drive, 12 denotes an opening, 14 denotes a base where oil accumulates after lubricating the drive, and 50 denotes a casing. The opening part 51 is a radiator to which the oil conveyed to the opening part is conveyed along.

In particular, the lubrication system 2 comprises a lubricating fluid for lubricating the drive 3 as shown in FIG. 7, in this embodiment an oil tank, the lubricating fluid tank 4 containing the drive 3. Is formed inside the casing (9).

And the drive 3 comprises a number of mechanical members in addition to the drive shaft, which are not essential elements for clearly understanding the present invention and are therefore not shown in the drawings.

As shown in FIG. 7, the lubrication pump 1 of the present invention has an inlet 6 which can be hydraulically connected to the tank 4 for lubricating fluid, and an outlet 7 which can be hydraulically connected to the lubrication target device 3. It includes, and the lubricating fluid is introduced through the inlet port from the lubricating fluid tank 4 is provided with a delivery unit 5 for compressing and sending the pressure to the lubrication target device (3) through the outlet.

The delivery unit 5 draws oil from the lubricating fluid tank 4 and compresses the oil to a nozzle 8 at a predetermined pressure which can be adjusted by a conventional valve (not shown), and then supplies the nozzle 8. Sprays the oil onto the shaft of the drive 3 to lubricate the drive.

And an inlet 11, which is hydraulically connectable to the casing 9, which accommodates the lubrication target device 3, and an outlet 13, which is hydraulically connectable to the lubricating fluid tank 4, wherein the casing ( 9) A recovery section 10 for transporting and recovering the lubricating fluid in the tank 4 for lubricating fluid is provided.

In addition, a housing 20 for accommodating the discharge unit 5 and the recovery unit 10 is provided.

On the other hand, after the discharge unit 5 lubricates the drive 3, the oil collected into the sump is recovered to the recovery unit 10 and supplied again to the lubricating fluid tank 4, and then withdrawn by the discharge unit 5. And supplied to the nozzle 8. In particular, the recovery unit 10 is formed in the casing (9) to supply oil into the lubricating fluid tank (4) through a plurality of openings (50) hydraulically connected to the outlet (13).

In particular, the housing 20 extends along axis A (shown only in FIGS. 3 and 4) as shown in FIGS. 3, 4, 6, and 7, and forms an axial end of the housing 20 and retrieves it. A first end body 21 having a second casing 27 for accommodating the portion 10 and a second end body having a shaft end portion and a first casing 26 for accommodating the delivery portion 5 are formed. 22 is provided.

The first, second and third plates 23, 24 and 25 are disposed between the first and second end bodies 21 and 22 in the axial direction.

In particular, referring to FIG. 1, the first plate 23 is disposed axially between the body 21 and the second plate 24, and the second plate 24 is formed of the first plate 23 and the first plate 23. The third plate 25 is placed axially between the three plates 25, and the third plate 25 is placed axially between the second plate 24 and the second end body 22.

The first end body 21 has a cavity formed toward the first plate 23 and forms a second casing 27 for receiving the recovery part 10 together with the first plate 23.

The second end body 22 has a cavity formed toward the third plate 25 and forms a first casing 26 for receiving the delivery section 5 together with the third plate 25.

In addition, the first, second, and third plates 23, 24, and 25 are disposed in the axial direction between the bodies 21 and 22 and disposed in each plane perpendicular to the axis A, and are transferred through the delivery unit 5. The first and second casings 26 and 27 are combined to be hermetically sealed by a lip seal so that the oil is not mixed with the oil conveyed through the recovery part 10.

In addition, the inlet 6 and the inlet 11 of the delivery section 5 and the recovery section 10 are each formed in a circular shape having an axis of symmetry parallel to the axis A. In particular, the inlet 6 and the inlet 11 are coaxial and are located on opposite sides of the first, second and third plates 23, 24, 25.

In addition, the outlet 13 and the outlet 7 of the delivery section 5, recovery section 10 are also all formed in a circular shape. In particular, the outlet 13 has an axis of symmetry perpendicular to the axis A and the outlet 7 has an axis of symmetry inclined with respect to the axis A.

The oil conveyed from the outlet 13 to the opening 50 is conveyed along one or more radiators 51, one of which is schematically shown in FIG. 7.

And the outlet 7 and the outlet 13 is located on the side of the shaft A opposite the inlet 6 and the inlet 11, the outlet 5 is the inlet 6 and outlet It is provided on the side (7) and has fixing parts 16 and 17 (FIG. 7) hydraulically connected to the tank 4 for lubricating fluid and the nozzle 8, respectively.

Similarly, the recovery part 10 has a fixed part 18 formed on the outlet 13 side and hydraulically connected to the tank 4 for lubricating fluid.

At this time, the recovery unit 10 is preferably carried out in a root type (Root type).

On the other hand, the housing 20 is the first and second rotors 31, which rotate in opposite directions within the housing 20 to supply the lubricating fluid from the inlet 11 to the outlet 13 of the recovery section 10, 32 is provided, i.e. the first and second rotors 31, 32 are housed in a cavity defined by the body 21, and the first and second rotors 31, 32 receive oil. Rotate in opposite directions about each axis B, C to feed from outlet 11 to outlet 13.

 In addition, the lobes 33 and 34 each having a predetermined number formed on the outer surfaces of the first and second rotors 31 and 32 have a conjugate profile in continuous contact with each other, and have an axis B. ) And axis C are parallel to axis A and to each other.

In addition, the lobes 33 and 34 and the second casing 27 of the first and second rotors 31 and 32 are movable to several chambers 40 (only one is shown in FIG. 5) relative to the axes B and C. ). Each time the first and second rotors 31 and 32 complete rotation, each chamber 40 is hydraulically connected to the inlet 11 to receive lubricating fluid from the opening 12; Away from the inlet 11 and the outlet 13 to supply lubricating fluid from the inlet 11 to the outlet 13; As shown in FIG. 5, the outlet 13 is hydraulically connected to return the lubricant fluid to the tank 4 for the lubricant fluid.

When the inlet 11 and the outlet 13 are separated from each other, the volume of the chamber 40 gradually decreases to compress the lubricating fluid therein.

In particular, the lobes 33 and 34 each have a cycloid-shaped contour that interacts with the lubricating fluid on the opposite sides of the shafts B and C and opposite to the inner surface of the body 21.

On the other hand, the delivery part 5 is a volumetric method, into the chamber from which the volume is reduced from the inlet 6 to the outlet 7 so as to gradually increase the pressure of the oil from the inlet 6 to the outlet 7. Use oil pushed in.

The first and second rotors 31 and 32 are provided with first and second gears 35 and 36 that are functionally connected, respectively. That is, the first and second gears 35 and 36 mesh with each other and rotate in opposite directions about the respective axes B and C.

The first, second gears 35, 36 and the first casing 26 form several chambers (not shown) that are movable relative to the axes B, C, and also the first gear 35. The hydraulic fluid is connected to the inlet port 6 in order to receive the lubricating fluid from the lubricating fluid tank 4 sequentially each time the rotation of the gas is completed, and is separated from the inlet port 6 and the outlet port 7, and the lubricating fluid is nozzled. It is hydraulically connected to the outlet 7 for supply to (8).

In particular, when away from the inlet 6 and the outlet 7, the chamber formed by the gears 35, 36 gradually decreases in volume so that the lubricating fluid is introduced therein to the feed value of the nozzle 8. To compress.

Meanwhile, the first gear 35 is integrally formed with the first shaft 37 connecting the first rotor 31 and the first gear 35 on the shaft B to the driving member (not shown in detail). It rotates about the axis B by this.

In particular, the first shaft 37 extends through the first, second and third plates 23, 24 and 25, and the end 38 protruding from the first end body 21 to the outside of the housing 20 is provided. It is also provided, which is also rotated by the drive member.

The second gear 36 is integrally formed with the second shaft 39 connecting the second rotor 32 and the second gear 36 to form the first, second, and third plates 23, 24, and 25. It extends through axis C.

The first and second rotors 31 and 32 are fixed on the respective first and second shafts 37 and 39 by keys, respectively.

Therefore, the first gear 35 rotates about the axis B by the rotation of the first shaft 37 about the axis B.

Thereafter, the rotation of the first gear 35 about the axis B rotates the second gear 36 about the axis C and the first rotor 31 about the axis B. As shown in FIG.

Finally, the rotation of the second gear 36 about the axis C causes the second rotor 32 to rotate about the axis C.

Thus, the first and second gears 35 and 36 coincide with the rotations of the first and second rotors 31 and 32, i.e. the respective shafts B, The first and second gears 35 and 36 are rotated with respect to C).

In particular, the first and second gears 35 and 36 have straight teeth.

On the other hand, the sending part 5 and the collecting part 10 may be provided with a collecting part to protect the transfer of the lubricating fluid under any working conditions of the driver 3 from oil accumulated or present in the sump of the driver 3 at the time of use. The size is determined so that the conveying amount through 10 is larger than the conveying amount through the sending part 5.

And the amount of oil conveyed through the recovery unit 10 is preferably at least 1.5 times the amount of oil conveyed through the delivery unit (5).

On the other hand, the head of the delivery section 5 is larger than the head of the recovery section 10.

In particular, while the oil is compressed from 1 bar to 10 bar by the delivery section 5, the compression applied to the oil transferred from the inlet 11 to the outlet 13 by the recovery section 10 can be ignored.

The lubrication system 2 of the present invention is a device for securing a known filter and high aerated oil flow through the recovery section 10 and deaerated oil flow through the delivery section 5 ( Not shown).

In actual use, the delivery section 5 draws oil from the lubricating fluid tank 4, compresses it, supplies it to the nozzle 8, and then injects pressurized oil to the drive 3 for lubrication.

In particular, the end 38 is rotated by a drive member (not shown) and the first gear 35 is rotated about the axis B. FIG. Subsequently, the second gear 36 rotates about the axis C by the rotation of the first gear 35 about the axis B. FIG.

As the first and second gears 35 and 36 rotate as described above, the oil conveyed through the inlet 6 is compressed, and the oil is supplied to the nozzle 8 through the outlet 7.

After lubricating the drive 3, oil is accumulated in the base 14 and drawn out through the opening 12 by the recovery part 10, and the recovery part 10 supplies the oil to the lubricating fluid tank 4. Return to.

Meanwhile, the first rotor 31 rotates about the axis B through the first shaft 37 by the rotation of the first gear 35, and the second rotor 32 by the rotation of the second gear 36. ) Rotates about axis C via second shaft 39.

As the first and second rotors 31 and 32 rotate in opposite directions, oil flowing from the inlet 11 is pushed into the chamber 40.

The chamber 40 rotates together with the first and second rotors 31 and 32 to supply oil in the second casing 27 to the outlet 13.

When the chamber 40 rotates together with the first and second rotors 31 and 32, oil is supplied to the lubricating fluid tank 4.

The advantages of the lubrication pump 1 according to the invention will be clear from the foregoing.

As described above, the present invention does not require two motors, that is, a motor driving the recovery part and the discharge part, respectively, and lubrication using a very small number of components by driving the recovery part and the delivery part of the lubrication pump with one motor. The pump is light in weight, small in size, and has an excellent lubricating effect.

In addition, the present invention is effective in preventing the accumulation and presence of lubricating fluid in the sump and increasing the effect of lubrication by recovering the lubricating fluid accumulated and present in a large amount of casing sump. .

In addition, another effect of the present invention is that since the recovery part lobe of the lubrication pump has a cycloid shape and the rotor is driven by the delivery part, the stress due to the relative sliding of the lobe is significantly reduced and the life of the rotor can be extended. have.

1 is an exploded perspective view of a lubrication pump according to the present invention.

FIG. 2 is an enlarged perspective view showing a part of the lubrication pump shown in FIG. 1. FIG.

3 and 4 are rear and front views of the pump shown in FIGS. 1 and 2.

5 is a cross-sectional view taken along the line V-V in FIG. 3.

6 is a cross-sectional view taken along the line VI-VI of FIG. 5.

7 is an exemplary view illustrating the operation of a system including a drive, a tank for lubricating fluid, and the lubrication pump shown in FIGS.

Explanation of symbols on the main parts of the drawings

1: Lubrication Pump

5: sending part

6: inlet port 7: outlet port

8: nozzle 16, 17: fixing part

10: recovery unit

11: entrance 13: exit

18: fixed part

20: housing

21: first end body 22: second end body

23, 24, 25: 1st, 2nd, 3rd plate 26: 1st casing

27: second casing

31: first rotor 32: second rotor

33, 34: Robe 35, 36: 1st, 2nd gear

37, 39: 1st, 2nd shaft 38: end

40: chamber

Claims (11)

In the lubrication pump (1), An inlet 6 which can be hydraulically connected to the tank 4 for lubricating fluid and an outlet 7 which is hydraulically connectable to the lubrication target device 3, wherein the lubricating fluid is introduced from the tank 4 for lubricating fluid. A delivery part 5 which is introduced through 6) and compressed and discharged to the lubrication target device 3 by the pressure through the delivery port 7; An inlet 11, which is hydraulically connectable to the casing 9, which houses the lubrication target device 3, and an outlet 13, which is hydraulically connectable to the lubricating fluid tank 4, wherein the casing 9. A recovery unit 10 for transferring and recovering the lubricating fluid in the tank) to the lubricating fluid tank 4; Lubricating pump, characterized in that it comprises a housing (20) for receiving the discharge portion (5) and the recovery portion (10). 2. The housing according to claim 1, wherein the housing (20) includes a first end body (21) having a shaft end portion and a second casing (27) for receiving the recovery portion (10); A second end body (22) having a shaft end portion and having a first casing (26) for receiving the discharge portion (5);  First, second and third plates (23, 24 and 25) disposed axially between the first and second end bodies (21 and 22); Supplying the lubricating fluid from the inlet (11) to the outlet (13) of the recovery part; first and second rotors (31, 32) rotating in opposite directions within the housing; The first and second rotors (31, 32) each of which has a predetermined number of lobes (33, 34); First and second gears 35 and 36 functionally connected to the first and second rotors 31 and 32, respectively; A first shaft (37) connecting the first rotor (31) and the first gear (35); A second shaft (39) connecting the second rotor (32) and the second gear (36); Lubricating pump, characterized in that it comprises an end (38) protruding outward of the housing (20) at one end of the first shaft (37). 3. The volume of the first and second lobes 33, 34, with the second casing 27, changes periodically, and in use the lubricant flows from the inlet 11 of the recovery part 10. Lubricating pump, characterized in that it comprises at least one chamber (40) fed to the outlet (13). The lubrication pump according to claim 2, wherein the first and second lobes (33, 34) each have a partially cycloid-shaped contour. The lubrication pump according to claim 1, wherein the head of the delivery part (5) is larger than the head of the recovery part (10). The method of claim 1, wherein the delivery unit 5 and the recovery unit 10 is so used that the transfer amount of the lubricating fluid passing through the recovery unit 10 is greater than the transfer amount of the lubricating fluid passing through the sending unit 5. Lubrication pump, characterized in that designed. The lubrication pump according to claim 1, wherein the transfer of the lubricating fluid passing through the recovery part (10) is at least 1.5 times that of the lubricating fluid passing through the sending part (5) in use. The lubrication pump according to claim 2, comprising a single housing (20) forming said first and second casings (26, 27). The method of claim 2, wherein the first shaft 37 is coupled to penetrate the center between the first and second casings 26 and 27, and the first and second casings 26 and 27 are hermetically coupled. Lubricating pump, characterized in that extending through at least one plate to be.  A lubrication system (2) for lubricating a device to be lubricated (3) using a lubrication pump (1) according to any one of the preceding claims. The lubrication system (2) according to claim 10, wherein the lubrication target device (3) comprises a drive or an aircraft turbine for powering the rotor of the helicopter.

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